Goldstone
Aventurine Glass (SiO2 + Cu small inclusions)
man-made glass mineral simulant
Category
Man Made Material (Jewelry, Metal Alloy)
Browse man made material (jewelry, metal alloy) specimens identified by the Rock Identifier community.
Learn about Man Made Material (Jewelry, Metal Alloy) in the encyclopedia
View all →
Crinoid Stem Fossil
Crinoid ossicle (Phylum Echinodermata)
fossil
Swirled Agate Bead
Silicon Dioxide (SiO2)
mineral
Green Agate
Cryptocrystalline Quartz (SiO2)
mineral
Bauxite Ore
Hydrated aluminum oxides (e.g., Gibbsite Al(OH)3, Boehmite ̲̲̲̲AlOOH, Diaspore ̲̲̲̲AlOOH)
Mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Diamond
C (Carbon)
gemstone
Pyrite (on Quartz/Host Rock)
Iron Sulfide (FeS₂)
mineral
Agate (specifically, multi-colored or pastel-dyed agate)
Silicon dioxide (SiO2) - specifically, a cryptocrystalline variety of quartz known as Chalcedony, with banding classified as Agate. (If it were Fluorite, the chemical formula would be Calcium Fluoride - CaF2).
Mineral
Turquoise
Hydrated phosphate of copper and aluminium: CuAl6(PO4)4(OH)8·4H2O
mineral
Peridot
Olivine (Mg, Fe)2SiO4
gemstone
Beryl (likely Aquamarine) in matrix
Be3Al2(SiO3)6 (Beryllium Aluminum Silicate)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lithium-bearing Phyllosilicate)
mineral
Obsidian (Black)
Obsidian (High-silica volcanic glass)
igneous
Petoskey Stone
Favosites alpenensis
fossil
Malachite
Malachite (Cu2CO3(OH)2)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Aventurine
Aventurine Quartz (SiO2 with inclusions of Fuchsite)
metamorphic
Diamond
Carbon (C)
gemstone
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite
metamorphic
Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite
mineral
Seven Chakra Bonded Stone
Bonded composite of Red Jasper, Carnelian, Tiger's Eye, Aventurine, Lapis Lazuli, Amethyst, and Clear Quartz
metamorphic
Gold Ore in Quartz
Native Gold (Au) in Quartz (SiO2)
mineral
Cubic Zirconia
Cubic Zirconia (Zirconium Dioxide, ZrO2)
mineral
Copper-bearing Quartz (likely Malachite on Quartz matrix)
Cu2CO3(OH)2 (Malachite) on SiO2 (Quartz)
mineral
Blue Goldstone
Aventurine Glass
Man-made mineral simulant (Glass)
Diamond
Carbon (C)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Black Chert (Flint / Basanite)
Microcrystalline / Cryptocrystalline Quartz (SiO2)
sedimentary
Jadeite and Mixed Gemstones (Ruby, Sapphire, Emerald)
Jadeite (NaAlSi2O6), Corundum (Al2O3), Beryl (Be3Al2(Si6O18))
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Petoskey Stone
Hexagonaria percarinata
fossil
Rough Diamond
Diamond (pure Carbon, C)
mineral
Petoskey Stone / Rugose Coral Fossil
Hexagonaria percarinata
fossil
Amethyst (Tumbled Cabinet Stone)
Silicon Dioxide (SiO2) with iron impurities
mineral
Obsidian
Obsidian (Volcanic Glass)
igneous
Quartzite
Quartzite (SiO2)
metamorphic
Pyrite
Iron Disulfide (FeS2)
mineral
Moonstone
Orthoclase Feldspar ((K,Na)AlSi3O8) with Albite inclusions
mineral